set it when it->method is set to next_element_from_display_vector.
(setup_for_ellipsis): Add LEN argument. Callers changed.
Set it->saved_face_id.
(get_next_display_element): Use loop instead of recursion.
Set it->saved_face_id. Combine duplicate code for ctr chars.
(next_element_from_display_vector): Do not set it->saved_face_id.
(next_element_from_ellipsis): Use setup_for_ellipsis.
width to those for special frames.
(gdb-frame-breakpoints-buffer): Use gdb-frame-parameters.
Use display-buffer.
(gdb-frame-stack-buffer, gdb-frame-threads-buffer)
(gdb-frame-registers-buffer, gdb-frame-locals-buffer)
(gdb-frame-assembler-buffer): Rework like
gdb-frame-breakpoints-buffer.
(calc-num-units, calc-den-units): New variables.
(calc-explain-units, calc-explain-units-rec): Replace variables
num-units and den-units by declared variables.
(math-cu-unit-list): New variable.
(math-build-units-table, math-compare-unit-names)
(math-convert-units, math-convert-units-rec): Replace variable
unit-list by declared variable.
(math-fbu-base, math-fbu-entry): New variables.
(math-find-base-units, math-find-base-units-rec): Replace variables
base and entry by declared variables.
(math-which-standard): New variable.
(math-to-standard-units, math-to-standard-rec): Replace variable
which-standard by declared variable.
(math-fcu-u): New variable.
(math-find-compatible-unit, math-find-compatible-unit-rec):
Replace variable u by declared variable.
(math-cu-new-units, math-cu-pure): New variables.
(math-convert-units, math-convert-units-rec): Replace variables
new-units and pure by declared variables.
(math-try-cancel-units): New variable.
(math-simplify-units-quotient): Replace variable try-cancel-units by
declared variable.
(math-polynomial-p1): Replace variable mpb-top-expr by declared
variable.
(math-poly-base-total-base): New variable.
(math-total-polynomial-base, math-polynomial-p1): Replace variable
mpb-total-base by declared variable.
(math-factored-vars, math-to-list): Declare it.
(math-fact-expr): New variable.
(calcFunc-factors, calcFunc-factor, math-factor-expr,
math-factor-expr-try, math-factor-expr-part): Replace variable expr by
declared variable.
(math-fet-x): New variable.
(math-factor-expr-try, math-factor-poly-coefs): Replace variable x by
declared variable.
(math-factor-poly-coefs): Make temp a local variable.
and default-indicate-buffer-boundaries from here.
(Usual Display): To here.
(Scroll Bars): Add scroll-bar-mode and scroll-bar-width.
(Usual Display): Move tab-width up.
(imenu--generic-function): Call comment-normalize-vars
if we have a comment syntax.
Exit the loop if REGEXP matches the null string.
Test comment-start as well as comment-start-skip
when deciding whether to check for comments.
