vim-patch.sh: Fix indentation, use GH URL for tagged versions. #2525

* Link to the commit details on GitHub for a tagged version.
* Non-tagged patches (runtime updates) are still linked to
  Google Code because they are identified by a Mercurial commit hash.

scripts/vim-patch.sh

@@ -47,11 +47,13 @@ get_vim_patch() {
     vim_version="${1}"
     vim_commit="v${1//./-}"
     strip_commit_line=true
+    vim_commit_url="https://github.com/vim/vim/commit/${vim_commit}"
   else
     # Interpret parameter as commit hash.
     vim_version="${1:0:7}"
     vim_commit="${1}"
     strip_commit_line=false
+    vim_commit_url="https://code.google.com/p/vim/source/detail?r=${vim_commit}"
   fi
 
   hg log --rev "${vim_commit}" >/dev/null 2>&1 || {
@@ -75,13 +77,13 @@ get_vim_patch() {
 
 ${vim_message}
 
-  https://code.google.com/p/vim/source/detail?r=${vim_commit}"
+${vim_commit_url}"
   neovim_pr="
 \`\`\`
 ${vim_message}
 \`\`\`
 
-  https://code.google.com/p/vim/source/detail?r=${vim_commit}
+${vim_commit_url}
 
 Original patch: