`lceil` and `rceil` have extra spacing.

It appears that theres extra spaces in the definitions for lceil and rceil. I'm not sure why they're there, and there may be a good reason for it. However, it causes the results in underleaf as shown in the images below (having a space after the first $ seems to make equations centered).

mitex/packages/mitex/specs/latex/standard.typ

Lines 105 to 107 in ead7177

    
           lceil: define-sym(" ⌈ "), 
        
           rceil: define-sym("⌉ "), 
        
           lfloor: define-sym("⌊ "),

In overleaf, there is no middle alignment, and the results show up inline.

It looks like other symbols have no extra spacing, so I'll open a PR for just these. Again, if there's a reason for those spaces, feel free to close this issue.

	lceil: define-sym(" ⌈ "),
	rceil: define-sym("⌉ "),
	lfloor: define-sym("⌊ "),