[man pages]: Revise some syntax synopses.

Use ellipsis more idiomatically, favoring it over plurals, and including
it within instead of outside option brackets for clarity.

The construction:

foo bar [baz] ...

is ambiguous.  If I specify no "baz", can "bar"s be repeated?

Also say "argument" when we mean an option OR an operand.

6 files changed, 6 insertions, 6 deletions

diff --git a/contrib/eqn2graph/eqn2graph.1.man b/contrib/eqn2graph/eqn2graph.1.man
index 472a91671..c05919082 100644
--- a/contrib/eqn2graph/eqn2graph.1.man
+++ b/contrib/eqn2graph/eqn2graph.1.man
@@ -39,7 +39,7 @@ equation into a cropped image
 .SY eqn2graph
 .RB [ \-format\~\c
 .IR output-format ]
-.RI [ convert-arguments ]
+.RI [ convert-argument \~.\|.\|.]
 .YS
 .
 .
diff --git a/contrib/grap2graph/grap2graph.1.man b/contrib/grap2graph/grap2graph.1.man
index 5914a846c..e7e87f3d7 100644
--- a/contrib/grap2graph/grap2graph.1.man
+++ b/contrib/grap2graph/grap2graph.1.man
@@ -40,7 +40,7 @@ diagram into a cropped image
 .RB [ \-unsafe ]
 .RB [ \-format\~\c
 .IR output-format ]
-.RI [ convert-arguments ]
+.RI [ convert-argument \~.\|.\|.]
 .YS
 .
 .
diff --git a/contrib/mm/mmroff.1.man b/contrib/mm/mmroff.1.man
index 0a34b3a4c..0a7031aa4 100644
--- a/contrib/mm/mmroff.1.man
+++ b/contrib/mm/mmroff.1.man
@@ -53,7 +53,7 @@ macro package
 .
 .SY mmroff
 .RB [ \-x ]
-.I groff-arguments
+.IR groff-argument \~.\|.\|.
 .YS
 .
 .
diff --git a/contrib/pic2graph/pic2graph.1.man b/contrib/pic2graph/pic2graph.1.man
index 84a906baf..f3c1c1eb3 100644
--- a/contrib/pic2graph/pic2graph.1.man
+++ b/contrib/pic2graph/pic2graph.1.man
@@ -42,7 +42,7 @@ diagram into a cropped image
 .IR output-format ]
 .RB [ \-eqn\~\c
 .IR delimiters ]
-.RI [ convert-arguments ]
+.RI [ convert-argument \~.\|.\|.]
 .YS
 .
 .
diff --git a/man/groff_out.5.man b/man/groff_out.5.man
index 672f56c7d..bc5662fb9 100644
--- a/man/groff_out.5.man
+++ b/man/groff_out.5.man
@@ -581,7 +581,7 @@ output driver library handles them.
 .
 .
 .TP
-.command m "scheme \f[R][\f[]component\f[R]] .\|.\|."
+.command m "scheme \f[R][\f[]component\f[R] .\|.\|.]"
 Select the stroke color using the
 .IR component s
 in the color space
diff --git a/src/preproc/eqn/neqn.1.man b/src/preproc/eqn/neqn.1.man
index 539afd018..758a150cd 100644
--- a/src/preproc/eqn/neqn.1.man
+++ b/src/preproc/eqn/neqn.1.man
@@ -50,7 +50,7 @@
 .\" ====================================================================
 .
 .SY @g@neqn
-.RI [ @g@eqn-options ]
+.RI [ @g@eqn-argument \~.\|.\|.]
 .YS
 .
 .