Fortran mode redefines TAB to reindent the current line for
fortran-indent-line). This command indents line numbers
and continuation markers to their required columns, and independently
indents the body of the statement based on its nesting in the program.
The key C-j runs the command
which reindents the current line then makes and indents a new line.
This command is useful to reindent the closing statement of `do'
loops and other blocks before starting a new line.
The key C-M-q runs
fortran-indent-subprogram, a command
to reindent all the lines of the Fortran subprogram (function or
subroutine) containing point.
The key C-M-j runs
fortran-split-line, which splits
a line in the appropriate fashion for Fortran. In a non-comment line,
the second half becomes a continuation line and is indented
accordingly. In a comment line, both halves become separate comment
M-^ runs the command
fortran-join-line, which is more or
less the inverse of
fortran-split-line. It joins the current
line to the previous line in a suitable way for Fortran code.
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