diff --git a/core-spec/expression_language.md b/core-spec/expression_language.md
index 42299977..e8be429e 100644
--- a/core-spec/expression_language.md
+++ b/core-spec/expression_language.md
@@ -389,6 +389,7 @@ is not guaranteed identical across engines.
 **Fractional seconds** are available everywhere but the token and precision differ
 (Oracle `FF1`–`FF9`, `strftime` `%f`, Java `S`…`SSSSSS`); treat sub-second formatting as
 a dialect extension.
+
 ---
 
 ## String Functions
@@ -398,7 +399,7 @@ a dialect extension.
 | Function | Syntax | Description |
 | :---- | :---- | :---- |
 | `CONCAT` | `CONCAT(str1, str2, ...)` | Concatenate strings |
-| `||` | `str1 || str2` | Concatenation operator |
+| `\|\|` | `str1 \|\| str2` | Concatenation operator |
 | `LENGTH` | `LENGTH(str)` | String length in characters |
 | `LOWER` | `LOWER(str)` | Convert to lowercase |
 | `UPPER` | `UPPER(str)` | Convert to uppercase |
@@ -664,7 +665,7 @@ expression:
 | :---- | :---- | :---- | :---- | :---- | :---- |
 | Date truncation | `DATE_TRUNC('month', d)` | `DATE_TRUNC('month', d)` | `DATE_TRUNC(d, MONTH)` | `DATE_TRUNC('month', d)` | `DATE_TRUNC('month', d)` |
 | Date add | `DATEADD(day, 7, d)` | `DATEADD(day, 7, d)` | `DATE_ADD(d, INTERVAL 7 DAY)` | `DATE_ADD(d, 7)` | `d + INTERVAL '7 days'` |
-| String concat | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `a || b` |
+| String concat | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `a \|\| b` |
 | Null coalesce | `COALESCE(a, b)` | `COALESCE(a, b)` or `NVL(a, b)` | `COALESCE(a, b)` or `IFNULL(a, b)` | `COALESCE(a, b)` | `COALESCE(a, b)` |
 | Current timestamp | `CURRENT_TIMESTAMP` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP` |
 | Substring | `SUBSTRING(s, start, len)` | `SUBSTR(s, start, len)` | `SUBSTR(s, start, len)` | `SUBSTRING(s, start, len)` | `SUBSTRING(s, start, len)` |
@@ -674,6 +675,7 @@ expression:
 ### Dialect-Specific Extensions
 
 Vendors may expose their own feature through extensions, however the default for Ossie should be to pass unknown values through.:  
+
 ---
 
 ## Cross-Reference: Tool Mappings