And here is a small patch for the docs On Thu, 1 Apr 2021 at 12:27, dalanicolai wrote: > 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 >>> >>