README.md tweaks (#200)

Fix typo and add missing opening-backticks
diff --git a/README.md b/README.md
index 7a43f0b..7da1d54 100644
--- a/README.md
+++ b/README.md
@@ -102,7 +102,7 @@
 
 Note for additional documentation see https://rptl.io/pico-get-started
 
-```
+```text
 $ picotool help
 PICOTOOL:
     Tool for interacting with RP-series device(s) in BOOTSEL mode, or with an RP-series binary
@@ -157,13 +157,13 @@
 
 ## info
 
-The is _Binary Information_ support in the SDK which allows for easily storing compact information that `picotool`
+There is _Binary Information_ support in the SDK which allows for easily storing compact information that `picotool`
 can find (See Binary Info section below). The info command is for reading this information.
 
 The information can be either read from one or more connected devices in BOOTSEL mode, or from 
 a file. This file can be an ELF, a UF2 or a BIN file.
 
-```
+```text
 $ picotool help info
 INFO:
     Display information from the target device(s) or file.
@@ -220,14 +220,14 @@
 
 e.g.
 
-
+```text
 $ picotool info
 Program Information
  name:      hello_world
  features:  stdout to UART
 ```
 
-
+```text
 $ picotool info -a
 Program Information
  name:          hello_world
@@ -248,7 +248,7 @@
  ROM version:  2
 ```
 
-
+```text
 $ picotool info -bp
 Program Information
  name:      hello_world
@@ -259,7 +259,7 @@
  21:  UART1 RX
 ```
 
-
+```text
 $ picotool info -a lcd_1602_i2c.uf2
 File lcd_1602_i2c.uf2: