It seems that time slot is currently most common, but that doesn’t prevent you from adhering to more (or less) traditional approaches.
Here is the google n-gram of the variants in use since 1940.
And it is always worth browsing at more venerable sources such as The New Yorker’s inimitable Comma Queen, Mary Norris, or, indeed, Wiktionary.
Preferred: We review a module or theme per user.
Optional: We review a module/theme per user.
Wrong: We review a module / theme per user.
When a forward slash is being used to signify options, a general rule is there should be no space on either side of a slash when the alternatives consist of a single word.
It is advised to leave a space for better ...
Names of places, including neighborhoods in cities, are often capitalized, according to the Chicago Manual of Style.
Thus Chicago has the Loop, the Near North side, the Magnificent Mile.
Your local newspapers probably have their own conventions for capitalization of parts of the city whose designations have become proper names, which you can discover by ...
The Chicago Manual of Style states that:
A note number should be placed at the end of a sentence or at the end of a clause. The number follows any punctuation mark, except for the dash, which it precedes. It follows a closing parenthesis.
That's section 16.30 in CMoS, 15th edition.
Seems pretty definitive to me.
Chicago Manual of Style features many examples of footnotes without spaces, and says nothing to contradict that practice. Also, from over a decade of experience with Chicago, I understand footnotes should follow directly after what they note without a space.
All of these examples of usage are in 14.26: Placement of note number in the online version of the ...
Here is an Ngram chart of "web page" (blue line) versus "web pages" (red line) versus "webpage" (green line) versus "webpages" (yellow line) for the period 1980–2019:
As you can see, the two-word versions of these terms were strongly favored from roughly 1995 through about 2009 in the published documents included in ...
To supplement the AMA's recommendations (noted in Polygnome's answer), I offer the following style guide recommendations.
From The Chicago Manual of Style, sixteenth edition (2010):
12.15 Basic spacing in mathematics. Mathematics isn't simply read left to right in a machine-like manner, and one should be able to see the parts of an equation if it is ...