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docs: adjust and extend the Pico-compatibility section in the manual

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Benno Schulenberg 2019-03-24 10:48:08 +01:00
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doc/nano.texi
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@ -1562,11 +1562,40 @@ browser exits.
@node Pico Compatibility
@chapter Pico Compatibility
@command{nano} emulates Pico as closely as is reasonable, but there
@command{nano} emulates Pico quite closely, but there
are some differences between the two editors:
@table @code
@item Hard-Wrapping
Unlike Pico, @command{nano} does not automatically hard-wrap the current
line when it becomes overlong during typing. This hard-wrapping can be
switched on with the @option{--breaklonglines} option. With that option,
@command{nano} by default breaks lines at screen width minus eight columns,
whereas Pico does it at screen width minus six columns. You can make
@command{nano} do as Pico by using @option{--fill=-6}.
@item Magic Newline
Pico ensures that any text always ends with a newline character.
Nano does not do this by default: the user is left in full control
of the formatting. You can get the automatic newline by using the
@option{--finalnewline} option.
@item Scrolling
By default, @command{nano} will scroll just one line (instead of half
a screen) when the cursor is moved to a line that is just out of view.
And when paging up or down, @command{nano} keeps the cursor in the same
screen position as much as possible, instead always placing it on the
first line of the viewport. The Pico-like behavior can be obtained
with the @option{--jumpyscrolling} option.
@item Edit Area
Pico never uses the line directly below the title bar, leaving it always
blank. @command{nano} includes this line in the editing area, in order
to not waste space, and because in this way it is slightly clearer where
the text starts. If you are accustomed to this line being empty, you can
get it back with the @option{--emptyline} option.
@item Interactive Replace
Instead of allowing you to replace either just one occurrence of a search
string or all of them, @command{nano}'s replace function is interactive: it
@ -1592,11 +1621,6 @@ The output of the "Display Cursor Position" command (@kbd{^C}) displays
not only the current line and character position of the cursor,
but also (between the two) the current column position.
@item Hard-Wrapping
By default, @command{nano} hard-wraps lines at screen width minus eight
columns, whereas Pico does it at screen width minus six columns. You can
make @command{nano} do the same as Pico by using @option{--fill=-6}.
@item Spell Checking
In the internal spell checker misspelled words are sorted alphabetically
and trimmed for uniqueness, such that the words 'apple' and 'Apple' will