Rename `git-sugpatch` to `git-sugdiff`

The word "patch" reminds me more of the `patch` Unix command, which is
what `git-sugapply` does.

Since this command outputs diffs, it makes more sense to call it
`sugdiff`. That also brings these closer to the native Git commands,
`git-diff` and `git-apply`.

I had chosen "patch" originally because the command generated a unified
diff that could be used as a patch file to apply to the repo.

2 files changed, 1 insertions, 56 deletions

diff --git a/src/bin/git-sugdiff.rs b/src/bin/git-sugdiff.rs
index 3bc787a..c703e2b 100644
--- a/src/bin/git-sugdiff.rs
+++ b/src/bin/git-sugdiff.rs
@@ -29,7 +29,7 @@ fn main() {
 
     let config = match Config::get(
         &args,
-        "usage: git sugpatch [options] <suggestion>...",
+        "usage: git sugdiff [options] <suggestion>...",
     ) {
         Ok(c) => c,
         Err(e) => {
diff --git a/src/bin/git-sugpatch.rs b/src/bin/git-sugpatch.rs
deleted file mode 100644
index 615bcff..0000000
--- a/src/bin/git-sugpatch.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (c) 2020  Teddy Wing
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <https://www.gnu.org/licenses/>.
-
-
-use std::env;
-use std::process;
-
-use exitcode;
-
-use github_suggestion_cli::{gseprintln, for_suggestion};
-use github_suggestion_cli::config::Config;
-
-
-fn main() {
-    let args: Vec<_> = env::args().collect();
-
-    let config = match Config::get(
-        &args,
-        "usage: git sugpatch [options] <suggestion>...",
-    ) {
-        Ok(c) => c,
-        Err(e) => {
-            gseprintln!(e);
-
-            process::exit(exitcode::CONFIG);
-        },
-    };
-
-    for_suggestion(
-        &config,
-        |suggestion| {
-            let diff = match suggestion.diff() {
-                Ok(d) => d,
-                Err(e) => {
-                    gseprintln!(e);
-                    process::exit(exitcode::UNAVAILABLE);
-                },
-            };
-
-            print!("{}", diff);
-        },
-    );
-}