New comment by roarde on void-packages repository

https://github.com/void-linux/void-packages/issues/25285#issuecomment-705305418

Comment:
The man command processed "3tcl" as a page-entry to search for, which matches with man's documentation.      
       `man -s n expr` displays the page for tcl's expr command. Section "n" is the default and usual place for tcl-command documentation. The man command will try using arguments as sections until the *first* one fails, then it and the remainder are taken to be pages to be searched for, and the first one found, rather than the first one listed in arguments, is displayed.  It found the *page* expr(1) first, so it didn't continue to look for the *page* for 3tcl. All proper. `man -s tcl3 expr` says "No entry for expr in section 3tcl of the manual"; also proper.         
            
We have tcl commands in section n, and the page for the installed binary tclsh in section 1; most usual, and by default. Tcl *libraries* are pulled off into the tcl-devel package along with their manpages in section 3.

Debian does histrionics with shell, sed, make, and patch to shove all the pages, *installed tclsh binary included*, into a created "3tcl". Confusion is normal, given that.