diff --git a/bin/git-comma b/bin/git-comma
index a200447c2..4381ab100 100755
--- a/bin/git-comma
+++ b/bin/git-comma
@@ -8,11 +8,11 @@ added=()
 
 # add unknown files...
 for arg; do
-  if [[ -f $arg && -n $(git ls-files -o $arg) ]]; then
-    git add $arg
+  if [[ -f "$arg" && -n $(git ls-files -o "$arg") ]]; then
+    git add "$arg"
     added+=($arg)
   fi
 done
 
 # ...reset them when commit is aborted
-git commit ${@:+-o} "$@" || git reset -q -- $added
+git commit ${@:+-o} "$@" || git reset -q -- "$added"
diff --git a/bin/git-ignored b/bin/git-ignored
index 1c81a76bd..9ff4b6898 100755
--- a/bin/git-ignored
+++ b/bin/git-ignored
@@ -2,4 +2,4 @@
 #
 # Show what files are being ignored in the repo
 
-git ls-files --others --i --exclude-standard
+exec git ls-files --others --i --exclude-standard
diff --git a/bin/git-nuke-untracked-files b/bin/git-nuke-untracked-files
index 4512485bc..3642c7ab1 100755
--- a/bin/git-nuke-untracked-files
+++ b/bin/git-nuke-untracked-files
@@ -7,3 +7,4 @@
 set -o pipefail
 
 git status -su | cut -d' ' -f2- | tr '\n' '\0' | xargs -0 rm
+exit $?
diff --git a/bin/git-purge-from-history b/bin/git-purge-from-history
index 0b8f07f3c..251925d99 100755
--- a/bin/git-purge-from-history
+++ b/bin/git-purge-from-history
@@ -10,13 +10,13 @@ set -o errexit
 #
 
 if [[ $# -eq 0 ]]; then
-  echo "You must specify a file/directory to purge from your git history"
+  echo 'You must specify a file/directory to purge from your git history'
   exit 1
 fi
 
 # make sure we're at the root of git repo
 if [[ ! -d .git ]]; then
-  echo "Error: must run this script from the root of a git repository"
+  echo 'Error: must run this script from the root of a git repository'
   exit 1
 fi
 
@@ -26,4 +26,4 @@ files=$@
 git filter-branch --index-filter "git rm -rf --cached --ignore-unmatch $files" HEAD
 
 # remove the temporary history git-filter-branch otherwise leaves behind for a long time
-rm -rf .git/refs/original/ && git reflog expire --all &&  git gc --aggressive --prune
+rm -rf .git/refs/original/ && git reflog expire --all && git gc --aggressive --prune
diff --git a/bin/git-root-directory b/bin/git-root-directory
index ff18031d2..920666009 100755
--- a/bin/git-root-directory
+++ b/bin/git-root-directory
@@ -2,4 +2,4 @@
 #
 # Print the root of the git checkout you're in.
 
-git rev-parse --show-toplevel
+exec git rev-parse --show-toplevel
diff --git a/bin/git-submodule-rm b/bin/git-submodule-rm
index 7d78c3568..2ff3d6dc9 100755
--- a/bin/git-submodule-rm
+++ b/bin/git-submodule-rm
@@ -10,9 +10,9 @@ if [[ -e $(pwd)/.gitmodules ]]; then
     echo 'Usage: git submodule-rm <path ...>'
   else
     for submodulepath in $@; do
-      git config -f .git/config --remove-section submodule.$submodulepath
-      git config -f .gitmodules --remove-section submodule.$submodulepath
-      git rm --cached $submodulepath
+      git config -f .git/config --remove-section "submodule.$submodulepath"
+      git config -f .gitmodules --remove-section "submodule.$submodulepath"
+      git rm --cached "$submodulepath"
     done
   fi
 else
diff --git a/bin/git-upstream-sync b/bin/git-upstream-sync
index f681029f1..9fb363373 100755
--- a/bin/git-upstream-sync
+++ b/bin/git-upstream-sync
@@ -5,6 +5,7 @@
 # https://github.com/unixorn/git-extra-commands/blob/master/LICENSE
 #
 # Sync to upstream/yourforkname and rebase into your local fork. then push
+# back into yourfork/yourforkname
 #
 # Assumes that your upstream fork's remote is named upstream