Fix - git precommit hook was a bit... over zealous 🤦 (#550)

.git-hooks/pre-commit

@@ -15,8 +15,20 @@ check_for_swiftformat() {
 
 format_staged_files() {
   git diff --diff-filter=d --staged --name-only | grep -e '\(.*\).swift$' | while read line; do
-    $formatter "${line}"
-    git add "$line"
+
+    # format the stages changes in a file
+
+    temporary_file="${line}.tmp.swift"
+    git show ":$line" > "$temporary_file"
+
+    $formatter "$temporary_file"
+    $formatter "$line"
+
+    blob=`git hash-object -w "$temporary_file"`
+
+    git update-index --add --cacheinfo 100644 $blob "$line"
+
+    rm "$temporary_file"
   done
 }
 

.swiftformat

@@ -4,3 +4,4 @@
 --trimwhitespace nonblank-lines
 --self init-only
 --stripunusedargs closure-only
+--headers ignore

CONTRIBUTING.md

@@ -11,10 +11,12 @@ This project makes use of the following tools:
 
 In order to benefit please ensure you have [Homebrew](https://brew.sh) installed on your system and then run the following commands inside the project directory:
 
-`cd /path/to/this/repo`
-`brew update`
-`brew bundle`
-`git config --local --add core.hooksPath .git-hooks`
+```
+cd /path/to/this/repo
+brew update
+brew bundle
+git config --local --add core.hooksPath .git-hooks
+```
 
 With these steps completed each time you build your code will be linted, and each time you commit your code will be formatted.