Document TryParseExact Span method overloads in System date and time types (#3435)

* Document TryParseExact Span method overloads in System types

* fix wrong singular params, a->an

* Fix additional a -> an

Author: carlossanlop

xml/System/DateTime.xml

@@ -8408,13 +8408,13 @@ The value of the current <xref:System.DateTime> object is formatted using the pa
         <Parameter Name="result" Type="System.DateTime" RefType="out" Index="4" FrameworkAlternate="netcore-2.1;netcore-2.2;netcore-3.0;netstandard-2.1" />
       </Parameters>
       <Docs>
-        <param name="s">To be added.</param>
-        <param name="format">To be added.</param>
-        <param name="provider">To be added.</param>
-        <param name="style">To be added.</param>
-        <param name="result">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="s">A span containing the characters representing a date and time to convert.</param>
+        <param name="format">The required format of <paramref name="s" />.</param>
+        <param name="provider">An object that supplies culture-specific formatting information about <paramref name="s" />.</param>
+        <param name="style">A bitwise combination of one or more enumeration values that indicate the permitted format of <paramref name="s" />.</param>
+        <param name="result">When this method returns, contains the <see cref="T:System.DateTime" /> value equivalent to the date and time contained in <paramref name="s" />, if the conversion succeeded, or <see cref="F:System.DateTime.MinValue" /> if the conversion failed. The conversion fails if either the <paramref name="s" /> or <paramref name="format" /> parameter is <see langword="null" />, is an empty string, or does not contain a date and time that correspond to the pattern specified in <paramref name="format" />. This parameter is passed uninitialized.</param>
+        <summary>Converts the specified span representation of a date and time to its <see cref="T:System.DateTime" /> equivalent using the specified format, culture-specific format information, and style. The format of the string representation must match the specified format exactly. The method returns a value that indicates whether the conversion succeeded.</summary>
+        <returns><see langword="true" /> if <paramref name="s" /> was converted successfully; otherwise, <see langword="false" />.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -8503,8 +8503,7 @@ The value of the current <xref:System.DateTime> object is formatted using the pa
         <param name="style">A bitwise combination of one or more enumeration values that indicate the permitted format of <paramref name="s" />.</param>
         <param name="result">When this method returns, contains the <see cref="T:System.DateTime" /> value equivalent to the date and time contained in <paramref name="s" />, if the conversion succeeded, or <see cref="F:System.DateTime.MinValue" /> if the conversion failed. The conversion fails if either the <paramref name="s" /> or <paramref name="format" /> parameter is <see langword="null" />, is an empty string, or does not contain a date and time that correspond to the pattern specified in <paramref name="format" />. This parameter is passed uninitialized.</param>
         <summary>Converts the specified string representation of a date and time to its <see cref="T:System.DateTime" /> equivalent using the specified format, culture-specific format information, and style. The format of the string representation must match the specified format exactly. The method returns a value that indicates whether the conversion succeeded.</summary>
-        <returns>
-          <see langword="true" /> if <paramref name="s" /> was converted successfully; otherwise, <see langword="false" />.</returns>
+        <returns><see langword="true" /> if <paramref name="s" /> was converted successfully; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[  
 
@@ -8619,8 +8618,7 @@ The value of the current <xref:System.DateTime> object is formatted using the pa
         <param name="style">A bitwise combination of enumeration values that indicates the permitted format of <paramref name="s" />. A typical value to specify is <see cref="F:System.Globalization.DateTimeStyles.None" />.</param>
         <param name="result">When this method returns, contains the <see cref="T:System.DateTime" /> value equivalent to the date and time contained in <paramref name="s" />, if the conversion succeeded, or <see cref="F:System.DateTime.MinValue" /> if the conversion failed. The conversion fails if <paramref name="s" /> or <paramref name="formats" /> is <see langword="null" />, <paramref name="s" /> or an element of <paramref name="formats" /> is an empty string, or the format of <paramref name="s" /> is not exactly as specified by at least one of the format patterns in <paramref name="formats" />. This parameter is passed uninitialized.</param>
         <summary>Converts the specified string representation of a date and time to its <see cref="T:System.DateTime" /> equivalent using the specified array of formats, culture-specific format information, and style. The format of the string representation must match at least one of the specified formats exactly. The method returns a value that indicates whether the conversion succeeded.</summary>
-        <returns>
-          <see langword="true" /> if the <paramref name="s" /> parameter was converted successfully; otherwise, <see langword="false" />.</returns>
+        <returns><see langword="true" /> if the <paramref name="s" /> parameter was converted successfully; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[  
 

xml/System/DateTimeOffset.xml

@@ -5690,14 +5690,13 @@ Me.ToUtcDateTime().ToFileTime()
         <Parameter Name="result" Type="System.DateTimeOffset" RefType="out" Index="4" FrameworkAlternate="netcore-2.1;netcore-2.2;netcore-3.0;netstandard-2.1" />
       </Parameters>
       <Docs>
-        <param name="input">A character span that contains the representation of a date and time to convert.</param>
+        <param name="input">A span containing the characters that represent a date and time to convert.</param>
         <param name="format">A format specifier that defines the required format of <paramref name="input" />.</param>
         <param name="formatProvider">An object that supplies culture-specific formatting information about <paramref name="input" />.</param>
         <param name="styles">A bitwise combination of enumeration values that indicates the permitted format of <paramref name="input" />. A typical value to specify is <see cref="F:System.Globalization.DateTimeStyles.None" /></param>
         <param name="result">When the method returns, contains the <see cref="T:System.DateTimeOffset" /> equivalent to the date and time of <paramref name="input" />, if the conversion succeeded, or <see cref="F:System.DateTimeOffset.MinValue" /> if the conversion failed. The conversion fails if the </param>
         <summary>Converts the representation of a date and time in a character span to its <see cref="T:System.DateTimeOffset" /> equivalent using the specified format, culture-specific format information, and style. The format of the date and time representation must match the specified format exactly.</summary>
-        <returns>
-          <see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
+        <returns><see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
@@ -5771,13 +5770,13 @@ The particular date and time symbols and strings used in `input` are defined by
         <Parameter Name="result" Type="System.DateTimeOffset" RefType="out" Index="4" FrameworkAlternate="netcore-2.1;netcore-2.2;netcore-3.0;netstandard-2.1" />
       </Parameters>
       <Docs>
-        <param name="input">To be added.</param>
-        <param name="formats">To be added.</param>
-        <param name="formatProvider">To be added.</param>
-        <param name="styles">To be added.</param>
-        <param name="result">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="input">A span containing the characters that represent a date and time to convert.</param>
+        <param name="formats">A array of standard or custom format strings that define the acceptable formats of <paramref name="input" />.</param>
+        <param name="formatProvider">An object that supplies culture-specific formatting information about <paramref name="input" />.</param>
+        <param name="styles">A bitwise combination of enumeration values that indicates the permitted format of <paramref name="input" />. A typical value to specify is <see cref="F:System.Globalization.DateTimeStyles.None" /></param>
+        <param name="result">When the method returns, contains the <see cref="T:System.DateTimeOffset" /> equivalent to the date and time of <paramref name="input" />, if the conversion succeeded, or <see cref="F:System.DateTimeOffset.MinValue" /> if the conversion failed. The conversion fails if the </param>
+        <summary>Converts the representation of a date and time in a character span to its <see cref="T:System.DateTimeOffset" /> equivalent using the specified formats, culture-specific format information, and style. The format of the date and time representation must match one of the specified formats exactly.</summary>
+        <returns><see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
@@ -5869,8 +5868,7 @@ This method parses the string representation of a date that matches any one of t
         <param name="styles">A bitwise combination of enumeration values that indicates the permitted format of input. A typical value to specify is <see langword="None" />.</param>
         <param name="result">When the method returns, contains the <see cref="T:System.DateTimeOffset" /> equivalent to the date and time of <paramref name="input" />, if the conversion succeeded, or <see cref="F:System.DateTimeOffset.MinValue" />, if the conversion failed. The conversion fails if the <paramref name="input" /> parameter is <see langword="null" />, or does not contain a valid string representation of a date and time in the expected format defined by <paramref name="format" /> and <c>provider</c>. This parameter is passed uninitialized.</param>
         <summary>Converts the specified string representation of a date and time to its <see cref="T:System.DateTimeOffset" /> equivalent using the specified format, culture-specific format information, and style. The format of the string representation must match the specified format exactly.</summary>
-        <returns>
-          <see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
+        <returns><see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
@@ -5984,8 +5982,7 @@ Strings that do not specify a UTC offset are assumed to have the offset of the l
         <param name="styles">A bitwise combination of enumeration values that indicates the permitted format of input. A typical value to specify is <see langword="None" />.</param>
         <param name="result">When the method returns, contains the <see cref="T:System.DateTimeOffset" /> equivalent to the date and time of <paramref name="input" />, if the conversion succeeded, or <see cref="F:System.DateTimeOffset.MinValue" />, if the conversion failed. The conversion fails if the <paramref name="input" /> does not contain a valid string representation of a date and time, or does not contain the date and time in the expected format defined by <paramref name="format" />, or if <paramref name="formats" /> is <see langword="null" />. This parameter is passed uninitialized.</param>
         <summary>Converts the specified string representation of a date and time to its <see cref="T:System.DateTimeOffset" /> equivalent using the specified array of formats, culture-specific format information, and style. The format of the string representation must match one of the specified formats exactly.</summary>
-        <returns>
-          <see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
+        <returns><see langword="true" /> if the <paramref name="input" /> parameter is successfully converted; otherwise, <see langword="false" />.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[