Backslashify all open/close punctuation so we don't confuse indenter

* lisp/leim/quail/latin-ltx.el: Quote characters with general-category
Ps and Pe (Punctuation, Open and Punctuation, Close) with backslash,
otherwise lisp indentation code gets confused.

lisp/leim/quail/latin-ltx.el

@@ -484,15 +484,15 @@ system, including many technical ones.  Examples:
  ("\\jmath" ?ȷ)
  ("\\ket" ?\⟩)
  ("\\land" ?∧) ;; logical and, same symbol as \wedge
- ("\\langle" ?⟨) ;; Was ?〈, see bug#12948.
+ ("\\langle" ?\⟨) ;; Was ?〈, see bug#12948.
  ("\\lAngle" ?\⟪)
- ("\\lbrace" ?{)
+ ("\\lbrace" ?\{)
  ("\\lbrack" ?\[)
  ("\\lBrack" ?\⟦)
  ("\\lblkbrbrak" ?\⦗)
  ("\\lbrbrak" ?\❲)
  ("\\Lbrbrak" ?\⟬)
- ("\\lceil" ?⌈)
+ ("\\lceil" ?\⌈)
  ("\\ldiv" ?∕)
  ("\\ldots" ?…)
  ("\\le" ?≤)
@@ -517,7 +517,7 @@ system, including many technical ones.  Examples:
  ("\\lesseqqgtr" ?⋚)
  ("\\lessgtr" ?≶)
  ("\\lesssim" ?≲)
- ("\\lfloor" ?⌊)
+ ("\\lfloor" ?\⌊)
  ("\\lgroup" ?\⟮)
  ("\\lhd" ?◁)
  ("\\rhd" ?▷)
@@ -642,16 +642,16 @@ system, including many technical ones.  Examples:
  ("\\rangle" ?\⟩) ;; Was ?〉, see bug#12948.
  ("\\rAngle" ?\⟫)
  ("\\ratio" ?∶)
- ("\\rbrace" ?})
+ ("\\rbrace" ?\})
  ("\\rbrack" ?\])
  ("\\rBrack" ?\⟧)
  ("\\rblkbrbrak" ?\⦘)
  ("\\rbrbrak" ?\❳)
  ("\\Rbrbrak" ?\⟭)
- ("\\rceil" ?⌉)
+ ("\\rceil" ?\⌉)
  ("\\rddots" ?⋰)
  ("\\rect" ?▭)
- ("\\rfloor" ?⌋)
+ ("\\rfloor" ?\⌋)
  ("\\rightarrow" ?→)
  ("\\rightarrowtail" ?↣)
  ("\\rightharpoondown" ?⇁)
@@ -923,9 +923,9 @@ system, including many technical ones.  Examples:
  ("\\ldata" ?\⟪) 			; fuzz/zed
  ("\\rdata" ?\⟫)
  ;; From Karl Eichwalder.
- ("\\glq"  ?‚)
+ ("\\glq"  ?\‚)
  ("\\grq"  ?‘)
- ("\\glqq"  ?„) ("\\\"`"  ?„)
+ ("\\glqq"  ?\„) ("\\\"`"  ?\„)
  ("\\grqq"  ?“) ("\\\"'"  ?“)
  ("\\flq" ?‹)
  ("\\frq" ?›)