scripts: make output from run-all-cleanup easier to parse

Make it clear that it didn't end prematurely due to some invisible problem.

scripts/run-all-cleanup

@@ -1,12 +1,13 b''
 #!/bin/sh
 
 # Convenience script for running various idempotent source code cleanup scripts
 
 set -e
 set -x
 
 scripts/docs-headings.py
 scripts/generate-ini.py
 scripts/whitespacecleanup.sh
 
 hg loc 'set:!binary()&grep("^#!.*python")' '*.py' | xargs scripts/pyflakes
+echo "no blocking problems found by $0"

scripts/whitespacecleanup.sh

@@ -1,23 +1,24 b''
 #!/bin/bash -x
 
 # Enforce some consistency in whitespace - just to avoid spurious whitespaces changes
 
 files=`hg mani | egrep -v '/fontello/|/email_templates/|(^LICENSE-MERGELY.html|^docs/Makefile|^scripts/whitespacecleanup.sh|/(graph|mergely|native.history)\.js|/test_dump_html_mails.ref.html|\.png|\.gif|\.ico|\.pot|\.po|\.mo|\.tar\.gz|\.diff)$'`
 
 sed -i "s/`printf '\r'`//g" $files
 sed -i -e "s,`printf '\t'`,    ,g" $files
 sed -i -e "s,  *$,,g" $files
 sed -i -e 's,\([^ ]\)\\$,\1 \\,g' -e 's,\(["'"'"']["'"'"']["'"'"']\) \\$,\1\\,g' $files
 # ensure one trailing newline - remove empty last line and make last line include trailing newline:
 sed -i -e '$,${/^$/d}' -e '$a\' $files
 
 sed -i -e 's,\([^ /]\){,\1 {,g' `hg loc '*.css'`
 sed -i -e 's|^\([^ /].*,\)\([^ ]\)|\1 \2|g' `hg loc '*.css'`
 
 hg mani | xargs chmod -x
 hg loc 'set:!binary()&grep("^#!")&!(**_tmpl.py)&!(**/template**)' | xargs chmod +x
 
 # isort is installed from dev_requirements.txt
 hg loc 'set:!binary()&grep("^#!.*python")' '*.py' | xargs isort --line-width 160 --lines-after-imports 2
 
+echo "diff after $0:"
 hg diff