a patch to fix optional arg notation in help

[Sam Steingold <sds@gnu.org>]

The notation (a,{b}) is used throughout the docs except these 4 cases.
This makes it hard to parse pari.desc to generate FFI.

>From a92a2d82c53f4ddf74a240f19980964e5023813b Mon Sep 17 00:00:00 2001
From: Sam Steingold <sds@gnu.org>
Date: Wed, 13 Dec 2017 11:11:43 -0500
Subject: [PATCH] Use the standard (a,{b}) notation for optional argument.

---
 src/functions/number_theoretical/ffnbirred | 2 +-
 src/functions/programming/dbg_x            | 2 +-
 src/functions/programming/iferr            | 3 +--
 src/functions/symbolic_operators/coeff     | 2 +-
 4 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/functions/number_theoretical/ffnbirred b/src/functions/number_theoretical/ffnbirred
index 117af0d9b..7b9aee4ab 100644
--- a/src/functions/number_theoretical/ffnbirred
+++ b/src/functions/number_theoretical/ffnbirred
@@ -2,7 +2,7 @@ Function: ffnbirred
 Section: number_theoretical
 C-Name: ffnbirred0
 Prototype: GLD0,L,
-Help: ffnbirred(q,n{,fl=0}): number of monic irreducible polynomials over F_q, of
+Help: ffnbirred(q,n,{fl=0}): number of monic irreducible polynomials over F_q, of
  degree n (fl=0, default) or at most n (fl=1).
 Description:
  (int, small, ?0):int      ffnbirred($1, $2)
diff --git a/src/functions/programming/dbg_x b/src/functions/programming/dbg_x
index 08d688035..b1a4c4331 100644
--- a/src/functions/programming/dbg_x
+++ b/src/functions/programming/dbg_x
@@ -2,7 +2,7 @@ Function: dbg_x
 Section: programming/control
 C-Name: dbgGEN
 Prototype: vGD-1,L,
-Help: dbg_x(A{,n}): print inner structure of A, complete if n is omitted, up to
+Help: dbg_x(A,{n}): print inner structure of A, complete if n is omitted, up to
  level n otherwise. Intended for debugging.
 Doc: Print the inner structure of \kbd{A}, complete if \kbd{n} is omitted, up
  to level \kbd{n} otherwise. This is useful for debugging. This is similar to
diff --git a/src/functions/programming/iferr b/src/functions/programming/iferr
index 16c113293..f4cc3b8aa 100644
--- a/src/functions/programming/iferr
+++ b/src/functions/programming/iferr
@@ -30,7 +30,7 @@ Function: iferr
 Section: programming/control
 C-Name: iferrpari
 Prototype: EVEDE
-Help: iferr(seq1,E,seq2{,pred}): evaluates the expression sequence seq1. If
+Help: iferr(seq1,E,seq2,{pred}): evaluates the expression sequence seq1. If
  an error occurs, set the formal parameter E set to the error data.
  If pred is not present or evaluates to true, catch the error and evaluate
  seq2. Both pred and seq2 can reference E.
@@ -229,4 +229,3 @@ Doc: evaluates the expression sequence \var{seq1}. If an error occurs,
   not exist, in function $s$. (As in \kbd{sqrt(Mod(-1,3))}.)
   \var{E} has two components, 1 (\typ{STR}): the function name $s$,
   2: the argument $x$.
-
diff --git a/src/functions/symbolic_operators/coeff b/src/functions/symbolic_operators/coeff
index 3061f86f5..270897759 100644
--- a/src/functions/symbolic_operators/coeff
+++ b/src/functions/symbolic_operators/coeff
@@ -1,6 +1,6 @@
 Function: _[_,_]
 Section: symbolic_operators
-Help: x[i{,j}]: i coefficient of a vector, i,j coefficient of a matrix
+Help: x[i,{j}]: i coefficient of a vector, i,j coefficient of a matrix
 Description:
  (mp,small):gen                 $"Scalar has no components"
  (mp,small,small):gen           $"Scalar has no components"
-- 
2.15.1

Thanks.

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1504
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