Here is a small patch for the re-builder docstring. I hope I did things correctly... On Thu, 1 Apr 2021 at 10:12, dalanicolai wrote: > Ah thanks. I thought I used case sensitive replace-regexp before, but > probably I am mistaking then. Section "34.3 Regular Expressions" of the > Emacs manual states that "[a-z]" or "[:lower:]" should match only lower > case, while it is not mentioned at all that it will not work by default > (case-fold-search as well as reb-toggle-case and reb-change-syntax are not > mentioned at all in that section as far as I can find). Indeed I was > referring to the docstring of re-builder. Anyway, I am happy to provide a > patch. > > > > On Thu, 1 Apr 2021 at 00:25, Basil L. Contovounesios > wrote: > >> dalanicolai writes: >> >> > When using the regexp builder and trying to match only lower case >> > letters (and spaces), Emacs also includes upper case matches. >> >> I think this is the effect of the user option case-fold-search, which >> defaults to non-nil (this is the case across most search-related parts >> of Emacs, including Isearch). You can toggle it in re-builder >> specifically with C-c C-c (reb-toggle-case), or across all buffers by >> customising case-fold-search to be nil. >> >> > Also, I am unable to find in the manual any information about the >> > option of setting different syntaxes in the regexp builder >> >> I think most of the documentation for re-builder.el is in its commentary >> at the start of the file; see M-x find-library RET re-builder RET. >> >> I haven't used re-builder much, but from M-x customize-group RET >> re-builder RET I see there is a user option reb-re-syntax for >> controlling the default syntax. C-h m in the re-builder buffer further >> reveals that the command C-c C-i (reb-change-syntax) can modify >> reb-re-syntax on the fly. >> >> > (also the option is not mentioned in the regexp-builder docstring). So >> > I would additionally like to report this as a documentation bug. >> >> Are you referring to the docstring of the re-builder command, or >> something else? And is it a listing of key bindings you would like to >> see, or something else? Would you like to provide a patch with >> suggestions for improvements? >> >> Thanks, >> >> -- >> Basil >> >