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4201 fopen(3c): The w mode should be bold, not underlined

*** 129,145 **** When opened, a stream is fully buffered if and only if it can be determined not to refer to an interactive device. The error and end-of-file indicators for the stream are cleared. .sp .LP ! If \fImode\fR begins with \fIw\fR or \fBa\fR and the file did not previously exist, upon successful completion, \fBfopen()\fR function will mark for update the \fBst_atime\fR, \fBst_ctime\fR and \fBst_mtime\fR fields of the file and the \fBst_ctime\fR and \fBst_mtime\fR fields of the parent directory. .sp .LP ! If \fImode\fR begins with \fIw\fR and the file did previously exist, upon successful completion, \fBfopen()\fR will mark for update the \fBst_ctime\fR and \fBst_mtime\fR fields of the file. The \fBfopen()\fR function will allocate a file descriptor as \fBopen\fR(2) does. .sp .LP --- 129,145 ---- When opened, a stream is fully buffered if and only if it can be determined not to refer to an interactive device. The error and end-of-file indicators for the stream are cleared. .sp .LP ! If \fImode\fR begins with \fBw\fR or \fBa\fR and the file did not previously exist, upon successful completion, \fBfopen()\fR function will mark for update the \fBst_atime\fR, \fBst_ctime\fR and \fBst_mtime\fR fields of the file and the \fBst_ctime\fR and \fBst_mtime\fR fields of the parent directory. .sp .LP ! If \fImode\fR begins with \fBw\fR and the file did previously exist, upon successful completion, \fBfopen()\fR will mark for update the \fBst_ctime\fR and \fBst_mtime\fR fields of the file. The \fBfopen()\fR function will allocate a file descriptor as \fBopen\fR(2) does. .sp .LP