Fix typos and capitalization of "Unicode" (#3234)

* Capitalize "Unicode"

* Fix several typos

* Fix mixed whitespace in nu-parser's tests

crates/nu-command/src/commands/autoenv.rs

@@ -17,7 +17,7 @@ impl WholeStreamCommand for Autoenv {
         // "Mark a .nu-env file in a directory as trusted. Needs to be re-run after each change to the file or its filepath."
         r#"Create a file called .nu-env in any directory and run 'autoenv trust' to let nushell load it when entering the directory.
 The .nu-env file has the same format as your $HOME/nu/config.toml file. By loading a .nu-env file the following applies:
-    - environment variables (section \"[env]\") are loaded from the .nu-env file. Those env variables are only existend in this directory (and children directories)
+    - environment variables (section \"[env]\") are loaded from the .nu-env file. Those env variables only exist in this directory (and children directories)
     - the \"startup\" commands are run when entering the directory
     - the \"on_exit\" commands are run when leaving the directory
 "#

crates/nu-command/src/commands/char_.rs

@@ -26,8 +26,8 @@ impl WholeStreamCommand for Char {
                 SyntaxShape::Any,
                 "the name of the character to output",
             )
-            .rest(SyntaxShape::String, "multiple unicode bytes")
-            .switch("unicode", "unicode string i.e. 1f378", Some('u'))
+            .rest(SyntaxShape::String, "multiple Unicode bytes")
+            .switch("unicode", "Unicode string i.e. 1f378", Some('u'))
     }
 
     fn usage(&self) -> &str {
@@ -51,12 +51,12 @@ impl WholeStreamCommand for Char {
                 ]),
             },
             Example {
-                description: "Output unicode character",
+                description: "Output Unicode character",
                 example: r#"char -u 1f378"#,
                 result: Some(vec![Value::from("\u{1f378}")]),
             },
             Example {
-                description: "Output multi-byte unicode character",
+                description: "Output multi-byte Unicode character",
                 example: r#"char -u 1F468 200D 1F466 200D 1F466"#,
                 result: Some(vec![Value::from(
                     "\u{1F468}\u{200D}\u{1F466}\u{200D}\u{1F466}",
@@ -77,7 +77,7 @@ impl WholeStreamCommand for Char {
 
         if unicode {
             if !rest.is_empty() {
-                // Setup a new buffer to put all the unicode bytes in
+                // Setup a new buffer to put all the Unicode bytes in
                 let mut multi_byte = String::new();
                 // Get the first byte
                 let decoded_char = string_to_unicode_char(&name.item, &name.tag);
@@ -104,8 +104,8 @@ impl WholeStreamCommand for Char {
                     )))
                 } else {
                     Err(ShellError::labeled_error(
-                        "error decoding unicode character",
-                        "error decoding unicode character",
+                        "error decoding Unicode character",
+                        "error decoding Unicode character",
                         name.tag(),
                     ))
                 }
@@ -136,8 +136,8 @@ fn string_to_unicode_char(s: &str, t: &Tag) -> Result<char, ShellError> {
         Ok(ch)
     } else {
         Err(ShellError::labeled_error(
-            "error decoding unicode character",
-            "error decoding unicode character",
+            "error decoding Unicode character",
+            "error decoding Unicode character",
             t,
         ))
     }

crates/nu-command/src/commands/size.rs

@@ -41,7 +41,7 @@ impl WholeStreamCommand for Size {
                 .into()]),
             },
             Example {
-                description: "Counts unicode characters correctly in a string",
+                description: "Counts Unicode characters correctly in a string",
                 example: r#"echo "Amélie Amelie" | size"#,
                 result: Some(vec![UntaggedValue::row(indexmap! {
                         "lines".to_string() => UntaggedValue::int(0).into(),

crates/nu-command/src/commands/str_/lpad.rs

@@ -68,7 +68,7 @@ impl WholeStreamCommand for SubCommand {
                 result: Some(vec![UntaggedValue::string("123").into_untagged_value()]),
             },
             Example {
-                description: "Use lpad to pad unicode",
+                description: "Use lpad to pad Unicode",
                 example: "echo '▉' | str lpad -l 10 -c '▉'",
                 result: Some(vec![
                     UntaggedValue::string("▉▉▉▉▉▉▉▉▉▉").into_untagged_value()

crates/nu-command/src/commands/str_/rpad.rs

@@ -68,7 +68,7 @@ impl WholeStreamCommand for SubCommand {
                 result: Some(vec![UntaggedValue::string("123").into_untagged_value()]),
             },
             Example {
-                description: "Use rpad to pad unicode",
+                description: "Use rpad to pad Unicode",
                 example: "echo '▉' | str rpad -l 10 -c '▉'",
                 result: Some(vec![
                     UntaggedValue::string("▉▉▉▉▉▉▉▉▉▉").into_untagged_value()

crates/nu-command/src/commands/table/command.rs

@@ -212,7 +212,7 @@ async fn table(
         {
             // This is called when the pager finishes, to indicate to the
             // while loop below to finish, in case of long running InputStream consumer
-            // that doesnt finish by the time the user quits out of the pager
+            // that doesn't finish by the time the user quits out of the pager
             pager.lock().await.add_exit_callback(move || {
                 finished_within_callback.store(true, Ordering::Relaxed);
             });