maint: Clean up m-files to follow Octave coding conventions. Try to trim long lines to < 80 chars. Use '##' for single line comments. Use '(...)' around tests for if/elseif/switch/while. Abut cell indexing operator '{' next to variable. Abut array indexing operator '(' next to variable. Use space between negation operator '!' and following expression. Use two newlines between endfunction and start of %!test or %!demo code. Remove unnecessary parens grouping between short-circuit operators. Remove stray extra spaces (typos) between variables and assignment operators. Remove stray extra spaces from ends of lines.

--- a/scripts/sparse/bicgstab.m
+++ b/scripts/sparse/bicgstab.m
@@ -63,7 +63,8 @@
 ##
 ## @item @var{iter} is the number of iterations performed.
 ##
-## @item @var{resvec} is a vector containing the relative residual at each iteration.
+## @item @var{resvec} is a vector containing the relative residual at each
+## iteration.
 ## @end itemize
 ##
 ## @seealso{bicg, cgs, gmres, pcg}