docs: grammar edits, sentence-case secondary headings

Also changes some heading levels so only one primary
heading appears per page.

1 files changed, 52 insertions, 52 deletions

diff --git a/docs/Xcode.md b/docs/Xcode.md
index 025cee9d7..c5a0a1500 100644
--- a/docs/Xcode.md
+++ b/docs/Xcode.md
@@ -1,6 +1,6 @@
 # Xcode
 
-## Supported Xcode Versions
+## Supported Xcode versions
 Homebrew supports and recommends the latest Xcode and/or Command Line
 Tools available for your platform:
 
@@ -14,58 +14,58 @@ Tools available for your platform:
 | 10.11 | 8.0   | 7.3                |
 | 10.12 | 8.0   | 8.0                |
 
-## Compiler Version Database
+## Compiler version database
 
- | Xcode | GCC 4.0 | GCC 4.2 | LLVM-GCC 4.2 | LLVM       | Clang           | LLVM (SVN) |
- |-------|---------|---------|--------------|------------|-----------------|------------|
- | 2.5.0 | 5370    | —       | —            | —          | —               | —          |
- | 3.1.4 | 5493    | 5577    | 5555         | 2064.3     | —               | —          |
- | 3.2.0 | 5493    | 5646    | 5646         | 2118       | —               | —          |
- | 3.2.1 | 5493    | 5646    | 5646         | 2206       | —               | —          |
- | 3.2.2 | 5493    | 5659    | 5646         | 2207.5     | 1.0.2           | —          |
- | 3.2.3 | 5494    | 5664    | 5658         | 2326.10    | 1.5 (60)        | —          |
- | 3.2.4 | 5494    | 5664    | 5658         | 2326.10    | 1.5 (60)        | —          |
- | 3.2.5 | 5494    | 5664    | 5658         | 2333.4     | 1.6 (70)        | —          |
- | 3.2.6 | 5494    | 5666    | 5658         | 2335.6     | 1.7 (77)        | 2.9        |
- | 4.0.0 | 5494    | 5666    | 5658         | 2335.9     | 2.0 (137)       | 2.9        |
- | 4.0.2 | 5494    | 5666    | 5658         | 2335.9     | 2.0 (137)       | 2.9        |
- | 4.1.0 | —       | 5666    | 5658         | 2335.15.00 | 2.1 (163.7.1)   | 3.0        |
- | 4.2.0 | —       | —       | 5658         | 2336.1.00  | 3.0 (211.10.1)  | 3.0        |
- | 4.3.0 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.45)  | 3.1        |
- | 4.3.1 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.54)  | 3.1        |
- | 4.3.2 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.58)  | 3.1        |
- | 4.3.3 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.61)  | 3.1        |
- | 4.4.0 | —       | —       | 5658         | 2336.11.00 | 4.0 (421.0.57)  | 3.1        |
- | 4.4.1 | —       | —       | 5658         | 2336.11.00 | 4.0 (421.0.60)  | 3.1        |
- | 4.5.0 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.65) | 3.1        |
- | 4.5.1 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.66) | 3.1        |
- | 4.5.2 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.66) | 3.1        |
- | 4.6.0 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.24)  | 3.2        |
- | 4.6.1 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.27)  | 3.2        |
- | 4.6.2 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.28)  | 3.2        |
- | 4.6.3 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.28)  | 3.2        |
- | 5.0.0 | —       | —       | —            | —          | 5.0 (500.2.76)  | 3.3        |
- | 5.0.1 | —       | —       | —            | —          | 5.0 (500.2.78)  | 3.3        |
- | 5.0.1 | —       | —       | —            | —          | 5.0 (500.2.79)  | 3.3        |
- | 5.1   | —       | —       | —            | —          | 5.1 (503.0.38)  | 3.4        |
- | 5.1.1 | —       | —       | —            | —          | 5.1 (503.0.40)  | 3.4        |
- | 6.0   | —       | —       | —            | —          | 6.0 (600.0.51)  | 3.5        |
- | 6.0.1 | —       | —       | —            | —          | 6.0 (600.0.51)  | 3.5        |
- | 6.1   | —       | —       | —            | —          | 6.0 (600.0.54)  | 3.5        |
- | 6.2   | —       | —       | —            | —          | 6.0 (600.0.57)  | 3.5        |
- | 6.3   | —       | —       | —            | —          | 6.1 (602.0.49)  | 3.6        |
- | 6.3.1 | —       | —       | —            | —          | 6.1 (602.0.49)  | 3.6        |
- | 6.3.2 | —       | —       | —            | —          | 6.1 (602.0.53)  | 3.6        |
- | 6.4   | —       | —       | —            | —          | 6.1 (602.0.53)  | 3.6        |
- | 7.0   | —       | —       | —            | —          | 7.0 (700.0.72)  | -          |
- | 7.0.1 | —       | —       | —            | —          | 7.0 (700.0.72)  | -          |
- | 7.1   | —       | —       | —            | —          | 7.0 (700.1.76)  | -          |
- | 7.1.1 | —       | —       | —            | —          | 7.0 (700.1.76)  | -          |
- | 7.2   | —       | —       | —            | —          | 7.0 (700.1.81)  | -          |
- | 7.2.1 | —       | —       | —            | —          | 7.0 (700.1.81)  | -          |
- | 7.3   | —       | —       | —            | —          | 7.3 (703.0.29)  | -          |
- | 7.3.1 | —       | —       | —            | —          | 7.3 (703.0.31)  | -          |
- | 8.0   | —       | —       | —            | —          | 8.0 (800.0.38)  | -          |
+| Xcode | GCC 4.0 | GCC 4.2 | LLVM-GCC 4.2 | LLVM       | Clang           | LLVM (SVN) |
+|-------|---------|---------|--------------|------------|-----------------|------------|
+| 2.5.0 | 5370    | —       | —            | —          | —               | —          |
+| 3.1.4 | 5493    | 5577    | 5555         | 2064.3     | —               | —          |
+| 3.2.0 | 5493    | 5646    | 5646         | 2118       | —               | —          |
+| 3.2.1 | 5493    | 5646    | 5646         | 2206       | —               | —          |
+| 3.2.2 | 5493    | 5659    | 5646         | 2207.5     | 1.0.2           | —          |
+| 3.2.3 | 5494    | 5664    | 5658         | 2326.10    | 1.5 (60)        | —          |
+| 3.2.4 | 5494    | 5664    | 5658         | 2326.10    | 1.5 (60)        | —          |
+| 3.2.5 | 5494    | 5664    | 5658         | 2333.4     | 1.6 (70)        | —          |
+| 3.2.6 | 5494    | 5666    | 5658         | 2335.6     | 1.7 (77)        | 2.9        |
+| 4.0.0 | 5494    | 5666    | 5658         | 2335.9     | 2.0 (137)       | 2.9        |
+| 4.0.2 | 5494    | 5666    | 5658         | 2335.9     | 2.0 (137)       | 2.9        |
+| 4.1.0 | —       | 5666    | 5658         | 2335.15.00 | 2.1 (163.7.1)   | 3.0        |
+| 4.2.0 | —       | —       | 5658         | 2336.1.00  | 3.0 (211.10.1)  | 3.0        |
+| 4.3.0 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.45)  | 3.1        |
+| 4.3.1 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.54)  | 3.1        |
+| 4.3.2 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.58)  | 3.1        |
+| 4.3.3 | —       | —       | 5658         | 2336.9.00  | 3.1 (318.0.61)  | 3.1        |
+| 4.4.0 | —       | —       | 5658         | 2336.11.00 | 4.0 (421.0.57)  | 3.1        |
+| 4.4.1 | —       | —       | 5658         | 2336.11.00 | 4.0 (421.0.60)  | 3.1        |
+| 4.5.0 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.65) | 3.1        |
+| 4.5.1 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.66) | 3.1        |
+| 4.5.2 | —       | —       | 5658         | 2336.11.00 | 4.1 (421.11.66) | 3.1        |
+| 4.6.0 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.24)  | 3.2        |
+| 4.6.1 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.27)  | 3.2        |
+| 4.6.2 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.28)  | 3.2        |
+| 4.6.3 | —       | —       | 5658         | 2336.11.00 | 4.2 (425.0.28)  | 3.2        |
+| 5.0.0 | —       | —       | —            | —          | 5.0 (500.2.76)  | 3.3        |
+| 5.0.1 | —       | —       | —            | —          | 5.0 (500.2.78)  | 3.3        |
+| 5.0.1 | —       | —       | —            | —          | 5.0 (500.2.79)  | 3.3        |
+| 5.1   | —       | —       | —            | —          | 5.1 (503.0.38)  | 3.4        |
+| 5.1.1 | —       | —       | —            | —          | 5.1 (503.0.40)  | 3.4        |
+| 6.0   | —       | —       | —            | —          | 6.0 (600.0.51)  | 3.5        |
+| 6.0.1 | —       | —       | —            | —          | 6.0 (600.0.51)  | 3.5        |
+| 6.1   | —       | —       | —            | —          | 6.0 (600.0.54)  | 3.5        |
+| 6.2   | —       | —       | —            | —          | 6.0 (600.0.57)  | 3.5        |
+| 6.3   | —       | —       | —            | —          | 6.1 (602.0.49)  | 3.6        |
+| 6.3.1 | —       | —       | —            | —          | 6.1 (602.0.49)  | 3.6        |
+| 6.3.2 | —       | —       | —            | —          | 6.1 (602.0.53)  | 3.6        |
+| 6.4   | —       | —       | —            | —          | 6.1 (602.0.53)  | 3.6        |
+| 7.0   | —       | —       | —            | —          | 7.0 (700.0.72)  | —          |
+| 7.0.1 | —       | —       | —            | —          | 7.0 (700.0.72)  | —          |
+| 7.1   | —       | —       | —            | —          | 7.0 (700.1.76)  | —          |
+| 7.1.1 | —       | —       | —            | —          | 7.0 (700.1.76)  | —          |
+| 7.2   | —       | —       | —            | —          | 7.0 (700.1.81)  | —          |
+| 7.2.1 | —       | —       | —            | —          | 7.0 (700.1.81)  | —          |
+| 7.3   | —       | —       | —            | —          | 7.3 (703.0.29)  | —          |
+| 7.3.1 | —       | —       | —            | —          | 7.3 (703.0.31)  | —          |
+| 8.0   | —       | —       | —            | —          | 8.0 (800.0.38)  | —          |
 
 ## References to Xcode and compiler versions in code
 When a new Xcode release is made, the following things need to be