* lisp/calc/calc-ext.el: Use lexical-binding, silence warnings.
(calc-init-extensions): Remove a few functions which can't be called
directly since they depend on dynamically scoped vars.
(calc-embedded-quiet): Declare.
(math-defcache): Use 'declare'.
(math-normalize-a): Remove declaration.
(math-normalize-nonstandard): Receive 'a' as arg instead.
(math-defintegral): Use 'declare'.
(math-exp-pos, math-exp-old-pos, math-exp-keep-spaces, math-rb-h2)
(math-read-big-baseline, math-read-big-h2, math-read-big-err-msg)
(math-exp-token, math-expr-data, math-exp-str): Declare.
(math-map-tree, math-read-expr): Avoid dynvars as formal arguments.
* lisp/calc/calc-poly.el: Use lexical-binding, silence warnings.
Turn some comments into docstrings.
(math-poly-div): Avoid dynvars as formal arguments.
(math-poly-base-top-expr): Move declaration before first use.
(calcFunc-factors, math-factor-expr, math-factor-expr-try)
(calcFunc-factor): Avoid dynvars as formal arguments.
* lisp/calc/calc.el: Use lexical-binding, silence warnings.
(math-normalize-a): Remove.
(math-normalize): Use lexical var 'a' instead.
(math-svo-c): Remove.
(math-stack-value-offset): Pass 'c' explicitly as arg to
math-stack-value-offset-fancy instead.
* lisp/calc/calccomp.el: Use lexical-binding, silence warnings.
(math-svo-c): Remove.
(math-stack-value-offset-fancy): Use new arg 'c' instead.
(math-comp-to-string-flat): Avoid dynvars as formal arguments.
* lisp/calc/calc-alg.el: Use lexical-binding and silence warnings.
(math-defsimplify): Let-bind 'expr' instead of math-simplify-expr.
Adjust all users.
(math-simplify-expr): Don't declare any more.
(math--simplify-divide-expr): New dynbound var.
(math-simplify-divide): Bind it when needed.
(math-simplify-divisor): Use it instead of math-simplify-expr.
(math-simplify-divisor): Only bind math-simplify-divisor-[nd]over
around the calls to math-simplify-one-divisor.
(math-expr-subst, math-is-polynomial): Don't use dynbound vars as
formal arguments.
(math-polynomial-base): Move binding of math-poly-base-pred.
Don't bind math-poly-base-top-expr any more...
* lisp/calc/calc-poly.el (math-total-polynomial-base): Bind it here instead!
* lisp/calc/calc-units.el: Use lexical-binding and silence warnings.
Adjust to the new 'expr' name in math-defsimplify.
(math-find-base-units, math-to-standard-units, math-convert-units):
Don't use dynbound vars as formal arguments.
(math-simplify-expr): Don't declare any more.
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November. Change these FTP URLs to https://ftp.gnu.org
instead. Make similar changes for URLs to other organizations moving
away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
(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.
