libm: Correct some typos in source code comments

- s/modfied/modified/
- s/minimun/minimum/

While here, fix some mandoc warnings:

- whitespace at end of input line
- unusual Xr punctuation
- missing comma before name

Obtained from:	NetBSD
MFC after:	5 days

lib/msun/i387/s_ceil.S

@@ -46,7 +46,7 @@ ENTRY(ceil)
 	orw	$0x0800,%dx		/* round towards +oo */
 	andw	$0xfbff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldl	8(%ebp);		/* round */
 	frndint

lib/msun/i387/s_ceilf.S

@@ -18,7 +18,7 @@ ENTRY(ceilf)
 	orw	$0x0800,%dx		/* round towards +oo */
 	andw	$0xfbff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	flds	8(%ebp);		/* round */
 	frndint

lib/msun/i387/s_ceill.S

@@ -16,7 +16,7 @@ ENTRY(ceill)
 	orw	$0x0800,%dx		/* round towards +oo */
 	andw	$0xfbff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldt	8(%ebp)			/* round */
 	frndint

lib/msun/i387/s_floor.S

@@ -46,7 +46,7 @@ ENTRY(floor)
 	orw	$0x0400,%dx		/* round towards -oo */
 	andw	$0xf7ff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldl	8(%ebp);		/* round */
 	frndint

lib/msun/i387/s_floorf.S

@@ -18,7 +18,7 @@ ENTRY(floorf)
 	orw	$0x0400,%dx		/* round towards -oo */
 	andw	$0xf7ff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	flds	8(%ebp);		/* round */
 	frndint

lib/msun/i387/s_floorl.S

@@ -16,7 +16,7 @@ ENTRY(floorl)
 	orw	$0x0400,%dx		/* round towards -oo */
 	andw	$0xf7ff,%dx
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldt	8(%ebp)			/* round */
 	frndint

lib/msun/i387/s_trunc.S

@@ -15,7 +15,7 @@ ENTRY(trunc)
 	movw	-4(%ebp),%dx
 	orw	$0x0c00,%dx		/* round towards -oo */
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldl	8(%ebp)			/* round */
 	frndint

lib/msun/i387/s_truncf.S

@@ -15,7 +15,7 @@ ENTRY(truncf)
 	movw	-4(%ebp),%dx
 	orw	$0x0c00,%dx		/* round towards -oo */
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	flds	8(%ebp)			/* round */
 	frndint

lib/msun/i387/s_truncl.S

@@ -15,7 +15,7 @@ ENTRY(truncl)
 	movw	-4(%ebp),%dx
 	orw	$0x0c00,%dx		/* round towards -oo */
 	movw	%dx,-8(%ebp)
-	fldcw	-8(%ebp)		/* load modfied control word */
+	fldcw	-8(%ebp)		/* load modified control word */
 
 	fldt	8(%ebp)			/* round */
 	frndint

lib/msun/man/clog.3

@@ -29,7 +29,7 @@
 .Os
 .Sh NAME
 .Nm clog ,
-.Nm clogf ,
+.Nm clogf
 and
 .Nm clogl
 .Nd complex natural logarithm functions

lib/msun/man/cospi.3

@@ -60,7 +60,7 @@ and
 functions returns
 .Fn cos "\(*p \(mu x" .
 If \*(Bax\*(Ba \*(Ge 2^(p - 1)
-where p is the floating\(enpoint precision of 
+where p is the floating\(enpoint precision of
 .Ar x ,
 then the returned value is 1 and it has no significance.
 .Sh SPECIAL VALUES
@@ -103,7 +103,7 @@ These functions conform to
 IEEE Std 754\(tm\(en2008 ,
 \(dqIEEE Standard for Floating-Point Arithmetic\(dq
 and to
-ISO/IEC TS 18661-4 , 
+ISO/IEC TS 18661-4 ,
 \(dqInformation technology \(em Programming languages, their environments,
 and system software interfaces \(em Floating\(enpoint extensions for
 C\(dq \(em Part 4: Supplementary functions.

lib/msun/man/sinpi.3

@@ -60,7 +60,7 @@ and
 functions returns
 .Fn sin "\(*p \(mu x" .
 If \*(Bax\*(Ba \*(Ge 2^(p - 1)
-where p is the floating\(enpoint precision of 
+where p is the floating\(enpoint precision of
 .Ar x ,
 then the returned value is \*(Pm0 and it has no significance.
 .Sh SPECIAL VALUES
@@ -95,7 +95,7 @@ These functions conform to
 IEEE Std 754\(tm\(en2008 ,
 \(dqIEEE Standard for Floating-Point Arithmetic\(dq
 and to
-ISO/IEC TS 18661-4 , 
+ISO/IEC TS 18661-4 ,
 \(dqInformation technology \(em Programming languages, their environments,
 and system software interfaces \(em Floating\(enpoint extensions for
 C\(dq \(em Part 4: Supplementary functions.

lib/msun/man/tanpi.3

@@ -49,7 +49,7 @@ The
 and
 .Fn tanpil
 functions compute the tangent of
-.Fa "\(*p \(mu x" 
+.Fa "\(*p \(mu x"
 and measure angles in half-cycles.
 .Sh RETURN VALUES
 The
@@ -60,7 +60,7 @@ and
 functions returns
 .Fn tan "\(*p \(mu x" .
 If \*(Bax\*(Ba \*(Ge 2^(p - 1)
-where p is the floating\(enpoint precision of 
+where p is the floating\(enpoint precision of
 .Ar x ,
 then the returned value is \*(Pm0 and it has no significance.
 .Sh SPECIAL VALUES
@@ -89,7 +89,7 @@ return an \*(Na and raises an FE_INVALID exception.
 .Xr math 3 ,
 .Xr sin 3 ,
 .Xr sinpi 3 ,
-.Xr tan 3 ,
+.Xr tan 3
 .Sh AUTHORS
 The half\(encycle trignometric functions were written by
 .An Steven G. Kargl Aq Mt kargl@FreeBSD.org .
@@ -98,7 +98,7 @@ These functions conform to
 IEEE Std 754\(tm\(en2008 ,
 \(dqIEEE Standard for Floating-Point Arithmetic\(dq
 and to
-ISO/IEC TS 18661-4 , 
+ISO/IEC TS 18661-4 ,
 \(dqInformation technology \(em Programming languages, their environments,
 and system software interfaces \(em Floating\(enpoint extensions for
 C\(dq \(em Part 4: Supplementary functions.

lib/msun/src/e_lgamma_r.c

@@ -27,7 +27,7 @@ __FBSDID("$FreeBSD$");
  *			    = log(6.3*5.3) + lgamma(5.3)
  *			    = log(6.3*5.3*4.3*3.3*2.3) + lgamma(2.3)
  *   2. Polynomial approximation of lgamma around its
- *	minimun ymin=1.461632144968362245 to maintain monotonicity.
+ *	minimum ymin=1.461632144968362245 to maintain monotonicity.
  *	On [ymin-0.23, ymin+0.27] (i.e., [1.23164,1.73163]), use
  *		Let z = x-ymin;
  *		lgamma(x) = -1.214862905358496078218 + z^2*poly(z)