With the following steps
S1: Open Help pressing F1
S2: enter `if in the search field
S3: click a topic in the result list
S4: search within the topic with find/replace (Crtl f) the term `if
I get plenty of results where I cannot find the search term in the help topic. Why is that?
Is help ignoring the left single quotes ` ?
I don't think so: I get usefull results for `` and `i, which in the later case also lists the topic "ifelse" that contains `if in the textbody.
So, why does advanced searching with the exact phrase "`if" not list the "ifelse" topic?
Why does the search term "(* " not list the relevant help topic help(comment)?
Somehow related in the context of getting more specific results: