Fix translation of unified diff to normal diff

Fixes issue #5.

Author: l0b0

Diff for: diff-ignore-moved-lines.sh

@@ -20,7 +20,7 @@
 #        https://github.com/l0b0/diff-ignore-moved-lines/issues
 #
 # COPYRIGHT
-#    Copyright (C) 2011-2012 Victor Engmark
+#    Copyright (C) 2011-2014 Victor Engmark
 #
 #    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
@@ -41,7 +41,7 @@ set -o errexit -o noclobber -o nounset -o pipefail
 
 # Only output diff lines (context lines and such would not be accurate anyway)
 # Also, convert unified diffs to "normal" diffs
-diff_lines="$(grep '^[><+-] ' | sed 's/^+/>/;s/^-/</')" || exit 0
+diff_lines="$(grep -v '^\(---\|+++\|@@ \)'| grep '^\([><] \)\|[+-]' | sed 's/^+/> /;s/^-/< /')" || exit 0
 
 while IFS= read -r line || [ -n "$line" ]
 do

Diff for: test.sh

@@ -91,8 +91,13 @@ Yoda
         "Moved and changed lines" \
         "$diff"x \
         "$(diff <(printf %s "$file1") <(printf %s "$file2") | "$cmd" || printf x)"
+
+    assertEquals \
+        "Moved and changed lines (unified)" \
+        "$diff"x \
+        "$(diff -u <(printf %s "$file1") <(printf %s "$file2") | "$cmd" || printf x)"
 }
 
 # load and run shUnit2
 test -n "${ZSH_VERSION:-}" && SHUNIT_PARENT=$0
-. /usr/share/shunit2/shunit2
+. shunit2