cmdutil: do not translate trivial string

wix: refactor and new guids.wxi

color: don't split colors across lines (which confuses less -R) Currently, less -R doesn't support colors spanning multiple lines; only the first line will be colorized. Instead of allowing colors to span multiple lines, the color extension now applies colors to each line it receives, even when ui.write() is given multiple lines in one call.

color: colorize based on output labels instead of parsing output By overriding ui.write(), ui.write_err(), ui.popbuffer(), and ui.label(), the color extension can avoid parsing command output and simply colorize output based on labels. As before, the color extension provides a list of default colors for core commands/labels. Other extensions can provide their own defaults by specifying a colortable dict (similar to cmdtable). In this process, --color is promoted to a global option and the deprecated --no-color option is removed.

record: make use of output labeling

qseries: make use of output labeling

qdiff: make use of output labeling

qguard: make use of output labeling

churn: make use of output labeling

bookmark: make use of output labeling

cmdutil: make use of output labeling in changeset_printer

diff: make use of output labeling

status: make use of output labeling

grep: make use of output labeling

ui: add ui.write() output labeling API This adds output labeling support with the following methods: - ui.write(..., label='topic.name topic2.name2 ...') - ui.write_err(.., label=...) - ui.popbuffer(labeled=False) - ui.label(msg, label) By adding an API to label output directly, the color extension can forgo parsing command output and instead override the above methods to insert ANSI color codes. GUI tools can also override the above methods and use the labels to do GUI-specific styling. popbuffer gains a labeled argument that, when set to True, returns its buffered output with labels handled. In the case of the color extension, this would return output with color codes embedded. For existing users that use this method to capture and parse output, labels are discarded and output returned as normal when labeled is False (the default). Existing wrappers of ui.write() and ui.write_err() should make sure to accept its new **opts argument.