[issue2399] be less verbose when merge tool is not found

[techtonik]

New submission from techtonik <techtonik at gmail.com>:

If Mercurial can't find merge tool, it complains on every file. That's 
annoying and makes output pretty useless.

...
couldn't find merge tool gvimdiff
couldn't find merge tool merge
merging spyderlib/widgets/editor.py
couldn't find merge tool ecmerge
couldn't find merge tool filemerge
couldn't find merge tool gpyfm
couldn't find merge tool kdiff3
couldn't find merge tool meld
couldn't find merge tool bcompare
couldn't find merge tool UltraCompare
couldn't find merge tool araxis
couldn't find merge tool beyondcompare3
couldn't find merge tool diffuse
couldn't find merge tool diffmerge
couldn't find merge tool p4merge
couldn't find merge tool tkdiff
couldn't find merge tool tortoisemerge
couldn't find merge tool xxdiff
couldn't find merge tool gvimdiff
couldn't find merge tool merge
merging spyderlib/widgets/editortools.py
couldn't find merge tool ecmerge
couldn't find merge tool filemerge
couldn't find merge tool gpyfm
couldn't find merge tool kdiff3
couldn't find merge tool meld
couldn't find merge tool bcompare
couldn't find merge tool UltraCompare
couldn't find merge tool araxis
couldn't find merge tool beyondcompare3
couldn't find merge tool diffuse
couldn't find merge tool diffmerge
couldn't find merge tool p4merge
couldn't find merge tool tkdiff
couldn't find merge tool tortoisemerge
couldn't find merge tool xxdiff
couldn't find merge tool gvimdiff
couldn't find merge tool merge
merging spyderlib/widgets/shell.py

----------
messages: 13728
nosy: techtonik
priority: bug
status: unread
title: be less verbose when merge tool is not found

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Mercurial issue tracker <bugs at mercurial.selenic.com>
<http://mercurial.selenic.com/bts/issue2399>
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