[newlib-cygwin] Remove curly braces in `@author` tag in .texi files

[Jeff Johnston]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=60c6397133b741a532579670929dbf47e25fbd31

commit 60c6397133b741a532579670929dbf47e25fbd31
Author: Freddie Chopin <freddie.chopin@gmail.com>
Date:   Sun Dec 17 10:01:45 2023 +0100

    Remove curly braces in `@author` tag in .texi files
    
    Curly braces cause documentation build failure with texinfo 7.1 (works fine
    up to 7.0.3):

Diff:
---
 newlib/libc/libc.texi | 8 ++++----
 newlib/libm/libm.texi | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/newlib/libc/libc.texi b/newlib/libc/libc.texi
index acb6afb5b..a5f24b15a 100644
--- a/newlib/libc/libc.texi
+++ b/newlib/libc/libc.texi
@@ -71,10 +71,10 @@ into another language, under the above conditions for modified versions.
 @sp 1
 @subtitle @code{libc} 4.3.0
 @subtitle January 2023
-@author {Steve Chamberlain}
-@author {Roland Pesch}
-@author {Red Hat Support}
-@author {Jeff Johnston}
+@author Steve Chamberlain
+@author Roland Pesch
+@author Red Hat Support
+@author Jeff Johnston
 @page
 
 @tex
diff --git a/newlib/libm/libm.texi b/newlib/libm/libm.texi
index d3ca9ae3c..bf8a07255 100644
--- a/newlib/libm/libm.texi
+++ b/newlib/libm/libm.texi
@@ -48,10 +48,10 @@ into another language, under the above conditions for modified versions.
 @sp 1
 @subtitle @code{libm} 4.3.0
 @subtitle January 2023
-@author {Steve Chamberlain}
-@author {Roland Pesch}
-@author {Red Hat Support}
-@author {Jeff Johnston}
+@author Steve Chamberlain
+@author Roland Pesch
+@author Red Hat Support
+@author Jeff Johnston
 @page
 
 @tex