fix link to COPYING in README.md
change color of ellipsis in abbreviations
Added tag 2.9 for changeset 254dec1347bf
add option "-a" ("--abbreviate")
Added tag 2.8 for changeset feeb9e97dbc3
add option "-M" ("--files-and-matches")
update README.md
Added tag 2.7 for changeset c3cb85d3f98e
add option "-n" ("--line-number")
Added tag 2.6 for changeset cffccade1ac9
catch keyboard interrupt
reformat Markdown files
Added tag 2.5 for changeset 2653d69e2473
add option "-C" ("--force-color")
minor edit in README.md
Added tag 2.4 for changeset 63c246abe9f0
add option "-r" ("--regex")
Added tag 2.3 for changeset 7e279b73fd6a
update usage in README.md
add option "-q" ("--quiet")
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