Thanks for pointing this out, this should be addressed in the next release.
Noticed this typo when I was updating DBGp protocol constants (f60c142b3069ecb116ca03d691f37e534c450bfc) upon checking the changelog of Xdebug's DBGp protocol documentation.
2015-11-11
7.7 Fixed type in IDE command from "stack-depth" to "stack_depth"
Thanks for pointing this out, this should be addressed in the next release.
Noticed this typo when I was updating DBGp protocol constants (f60c142b3069ecb116ca03d691f37e534c450bfc) upon checking the changelog of Xdebug's DBGp protocol documentation.